Former 100m world record-holder Asafa Powell predicted Jamaicans would dominate the 100 metres at the upcoming World Championships in South Korea with US star Tyson Gay out of the picture.

Gay has a hip injury and is unlikely to compete at the World Championships in late August and early September at Daegu after pulling out of the US championships, helping give new Jamaican 100m champion Powell his confidence.

"It's just a Jamaican thing," Powell said. "I hope we can take it 1-2-3-4."

Powell said. he is yet to return to full fitness, even after his victory over Yohan Blake in the 100m final at the Jamaican Championships on Friday.

Powell pulled a hamstring three weeks ago at a meet in Rabat, Morocco. He stopped just as he came out of his drive phase and grabbed his right hamstring as he walked across the finish line in 36.13.